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254
METALLURGY OF IROST AND STEEL.
SEC. Xlllh.—Investigations on Swedish steel.—The experiments related in this chapter were,, for the most part, made at Steelton; manufacturers, as a rule,, do not want .to discuss segregation at all, and published records are rare. Recently, however, an account has been written hy Wahlberg* on investigations on
TABLE XIII-0. Homogeneity of Acid Open-Hearth Nickel Steel.
Site of ingot, 18"x20": made by The Pennsylvania Steel Company. Composition of preliminary test, per cent.: C, .24; Mn, .78; P, .082; 8, .027.
							S-3	•»  a	S		•g
i	Shape into -which slab was rolled.	•u 03 0) -U "M O	Composition ; per cent.				.^3 It	stic limi s. per uareinc	ft	ngation 2 inche sr cent.	H ** l& Is3
%		O					SSE£	capo-	-3.3 S,	XX*	"S 03 8
3		•fc	Ni.	P.	Mn.	S.	P	S	H	W	«
		1	8.22	.088	0.78	.038	86480	59000	19.25	87.00	47.8
		2	8.21	.040	0.80	.046	88500	69500	20.50	86.00	89.1
A	Jd-lnch universal mill plate.	8 4	8.81 8.24	.035 .039	0.78 0.78	.034 .036	85140 88700	59240 58100	21.75 19.75	89.00 84.50	64.2 88.fl
		6	8.22	.031	0.77	.028	84080	57820	21.25	'40.00	68.1
		6	8.29	.037	0.77 i	.02ft	85400	69410	19.75	88.00	51.6
•R	%-lnch sheared	7 8	8.27 8.29	.035 .089	0.77 0.77	.034 .037	84440 86680	68800 69640	19.50 17.00	87.00 81.50	48.8 42.8
	plate.	9	8.27	.087	0.78	.038	86520	69560	20.50	87..00	52.6
C	^-ineh universal mill plate.	10 11	8.22 8.22	.037 .037	0.77 0.78	.032 .032	86200 85660	68260 56760	21.00 22.00	40.00 42.00	54.1 63.1
	%-inch sheared	12	8.21	.085	0,77	.084	85180	66800	19.00	84.50	60.2
	plate.	18	8.21	.035	0.78	.038	84020	67600	20.50	89.00	52.2
E	Angles.	14	8.25	.088	0.77	.033	86960	68550	21.75	89.67	60.5
NOTE.—The following diagram shows the parts of the ingot which correspond to
the places in the plates from which the tests, given in the third
column of above table, were taken.
	M                             M	M			cn       co       »-i	
	*              it-	b5	o			
a»						o
00						o ^
* £		^d	!_•	to                 oo	Gfc           tlk          feO	*O T
a>S OH O.P		«				I'S
'	Slab E.	Slab D.	Slab C.	Slab B.	Blab A.	"
Swedish steels. He gives the determinations by three chemists of the carbon and phosphorus in different steels, and Table XIII-P shows the averages from his tables. Inspection will show that B, E, G-, H, J and L, which is to say one-half of all the ingots, showed no segregation of either carbon or phosphorus. F, I and K showed segregation in the center of the top of both carbon and phosphorus, but none elsewhere. C and D showed segrega-
* Journal L and S. I., Vol. II, 1901.